Re: [RFC PATCH] mm, memory_hotplug: support movable_node for hotplugable nodes

[Reza Arbab]

On Thu, Jun 01, 2017 at 02:20:04PM +0200, Michal Hocko wrote:
> Teach move_pfn_range that MMOP_ONLINE_KEEP can use the movable zone if
> movable_node is enabled and the range doesn't overlap with the existing
> normal zone. This should provide a reasonable default onlining strategy.

I like it. If your distro has some auto-onlining udev rule like

SUBSYSTEM=="memory", ACTION=="add", ATTR{state}=="offline", ATTR{state}="online"

You could get things onlined as movable just by putting movable_node in
the boot params, without changing/modifying the rule.

--
Reza Arbab